Redis學習筆記~StackExchange.Redis實現分布式Session - lori－IT工程師數位筆記本

文章出處

對于多WEB的環境現在已經是必須的了，很難想像一臺WEB服務器面對百萬并發的響應，所以，我們需要多臺WEB服務器集群合作，來緩解這種高并發，高吞吐的場景，而對于多WEB的場景又會有個問題出現，即session存儲的問題，如一個用戶登陸后，把一個狀態信息存儲到當前WEB服務器的session里，而你請求其它頁面時，很可能就被路由到另一臺服務器了，這時，session也就丟了，而對于這種情況，有人把redis這個存儲中間件想了起來，對它進行了封裝，就有了今天基于redis的session共享機制。

下面說下安裝方法

1 使用nuget安裝redis緩存 StackExchange.Redis
2 使用nuget安裝RedisSession服務　 RedisSessionStateProvider
3 從nuget添加RedisSession之后，它會在你的config文件中寫入以下內容，主要是對session進行持久化設置的

<sessionState mode="Custom" customProvider="MySessionStateStore" timeout="30">
      <providers>
        <!-- Either use 'connectionString' and provide all parameters as string OR use 'host','port','accessKey','ssl','connectionTimeoutInMilliseconds' and 'operationTimeoutInMilliseconds'. -->
        <!-- 'throwOnError','retryTimeoutInMilliseconds','databaseId' and 'applicationName' can be used with both options. -->
        <!--
          <add name="MySessionStateStore"
            host = "127.0.0.1" [String]
            port = "" [number]
            accessKey = "" [String]
            ssl = "false" [true|false]
            throwOnError = "true" [true|false]
            retryTimeoutInMilliseconds = "5000" [number]
            databaseId = "0" [number]
            applicationName = "" [String]
            connectionTimeoutInMilliseconds = "5000" [number]
            operationTimeoutInMilliseconds = "1000" [number]
            connectionString = "<Valid StackExchange.Redis connection string>" [String]
            loggingClassName = "<Assembly qualified class name that contains logging method specified below>" [String]
            loggingMethodName = "<Logging method should be defined in loggingClass. It should be public, static, does not take any parameters and should have a return type of System.IO.TextWriter.>" [String]
          />
        -->
        <add name="MySessionStateStore" type="Microsoft.Web.Redis.RedisSessionStateProvider" host="127.0.0.1" accessKey="" ssl="false" />
      </providers>
    </sessionState>